B + W Circular Polarizer Kaesemann - Xtra Slim Mount (XS-PRO), HTC, 16 Layers Multi-Resistant and Nano Coating, Photography Filter, 77 mm. A "state of the art" polarizing filter, I doubt if there is any better. Used but I can see no defects whatsoever in the filter. Price includes shipping. Payment by PayPal only.
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